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We study local density of state (LDOS) oscillations arising from the scattering of electrons at atomic edge defects in topological insulator (TI) surfaces. To create edge scattering on the surface of a TI, we assume that half of its surface…

Mesoscale and Nanoscale Physics · Physics 2024-09-04 David J. Alspaugh , D. N. Sheng , Mahmoud M. Asmar

We have measured the evolution of the tunneling density of states (DOS) in superconductor/ferromagnet (S/F) bilayers with increasing F-layer thickness, where F in our experiment is the strong ferromagnet Ni. As a function of increasing Ni…

Superconductivity · Physics 2015-05-30 Kurt M. Boden , W. P. Pratt , Norman O. Birge

The profiles of local density of states (LDOS) around different vortex configurations in mesoscopic superconductors are studied taking account of the interference of quasiparticle waves experiencing Andreev reflection within the vortex…

Superconductivity · Physics 2015-05-13 A. S. Mel'nikov , D. A. Ryzhov , M. A. Silaev

Local density of states (LDOS) in the triangular vortex lattice is investigated based on the quasi-classical Eilenberger theory. We consider the case of an isotropic s-wave superconductor with the material parameter appropriate to NbSe_2.…

Superconductivity · Physics 2016-08-31 Masanori Ichioka , Nobuhiko Hayashi , Kazushige Machida

We study analytically the local density of states in a disordered normal-metal wire at ballistic distance to a superconductor. Our calculation is based on a scattering-matrix approach, which concerns for wave-function localisation in the…

Disordered Systems and Neural Networks · Physics 2009-09-29 M. Titov , H. Schomerus

We study the density of states (DOS) inside superconducting Josephson SIsFS junctions with complex interlayer consisting of a thin superconducting spacer 's' between insulator I and a ferromagnetic metal F. The consideration is focused on…

Superconductivity · Physics 2021-08-11 S. V. Bakurskiy , A. A. Neilo , N. V. Klenov , I. I. Soloviev , A. A. Golubov , M. Yu. Kupriyanov

We performed numerical calculations of the local density of states (LDOS) at disorder induced localization-delocalization transitions. The LDOS defines a spatial measure for fixed energy and a spectral measure for fixed position. At the…

Mesoscale and Nanoscale Physics · Physics 2009-10-30 Bodo Huckestein , Rochus Klesse

We consider the effect of the finite size in the ab-plane on the surface density of states (DoS) in clean d-wave superconductors. In the bulk, the DoS is gapless along the nodal directions, while the presence of a surface leads to formation…

Superconductivity · Physics 2007-05-23 Ya. V. Fominov , A. A. Golubov

We have measured the tunneling density of states (DOS) in a superconductor carrying a supercurrent or exposed to an external magnetic field. The pair correlations are weakened by the supercurrent, leading to a modification of the DOS and to…

Superconductivity · Physics 2009-11-10 A. Anthore , H. Pothier , D. Esteve

The superconducting energy gap and quasiparticle density of states (DOS) is measured by means of Andreev-reflection spectroscopy in normal metal - superconductor point contacts. It is found that both in paramagnetic and in…

Superconductivity · Physics 2007-05-23 I. K. Yanson

We measured the local density of states (LDOS) of a quasi two-dimensional (2D) electron system near point defects on a surface of highly oriented pyrolytic graphite (HOPG) with scanning tunneling microscopy and spectroscopy. Differential…

Mesoscale and Nanoscale Physics · Physics 2009-11-11 Y. Niimi , H. Kambara , T. Matsui , D. Yoshioka , Hiroshi Fukuyama

We review the mesoscopic transport in a diffusive proximity superconductor made of a normal metal (N) in metallic contact with a superconductor (S). The Andreev reflection of electrons on the N-S interface is responsible for the diffusion…

Condensed Matter · Physics 2009-10-31 H. Courtois , Ph. Gandit , B. Pannetier , D. Mailly

The low-energy density of states (DOS) of disordered 2D d-wave superconductors is extremely sensitive to details of both the disorder model and the electronic band structure. Using diagrammatic methods and numerical solutions of the…

Condensed Matter · Physics 2009-11-07 A. G. Yashenkin , W. A. Atkinson , I. V. Gornyi , P. J. Hirschfeld , D. V. Khveshchenko

We have designed and built a near-field scanning microwave microscope, which has been used to measure the local microwave response and the local density-of-states (LDOS) in the area including the boundary between the gold deposited and the…

Mesoscale and Nanoscale Physics · Physics 2013-12-05 Tadashi Machida , Marat B. Gaifullin , Shuuichi Ooi , Takuya Kato , Hideaki Sakata , Kazuto Hirata

In a recent letter Chicanne {\em et al.} [1] reported the experimental observation of the electromagnetic local density of states LDOS established by gold nanostructures. The obtained images have been compared with combinations of partial…

Materials Science · Physics 2009-11-10 S. Savasta , O. Di Stefano , R. Girlanda , M. Pieruccini

Electron energy-loss spectroscopy (EELS) performed in transmission electron microscopes is shown to directly render the photonic local density of states (LDOS) with unprecedented spatial resolution, currently below the nanometer. Two…

Materials Science · Physics 2012-11-13 F. J. Garcia de Abajo , M. Kociak

Motivated by recent high-resolution scanning tunneling microscopy (STM) experiments in the quantum Hall regime both on massive two-dimensional electron gas and on graphene, we consider theoretically the disorder averaged nonlocal…

Mesoscale and Nanoscale Physics · Physics 2011-04-04 T. Champel , S. Florens , M. E. Raikh

The local density of states (LDOS) in a one-dimensional helical channel of finite length is studied within a Tomonaga-Luttinger model at zero temperature. Two particular cases of loop and Josephson junction geometries are considered. The…

Mesoscale and Nanoscale Physics · Physics 2015-06-19 Yositake Takane

The diamagnetism of a normal metal (N: Cu or Au), which is induced by the proximity effect of a superconductor (S: Nb), has been investigated for N-S double layers, which are formed by a thin-film deposition process. Detailed studies of…

Superconductivity · Physics 2009-10-31 A. Sumiyama , T. Endo , Y. Nakagawa , Y. Oda

Based on a Fermi liquid picture, the temperature effect on the impurity-induced spatial modulation of local density of states (LDOS) is investigated for the d-wave superconductor Bi$_2$Sr$_2$CaCu$_2$O$_8$, in the context of scanning…

Superconductivity · Physics 2009-11-10 K. -K. Voo , W. C. Wu , H. -Y. Chen , C. -Y. Mou